8 km east of Fort Wallace (Cretaceous of the United States)

Also known as Polycotylus latipinnis type locality

Where: Logan County County, Kansas (38.9° N, 101.5° W: paleocoordinates 44.6° N, 71.4° W)

• coordinate estimated from map

When: Hesperornis other zone, Smoky Hill Chalk Member (Niobrara Formation), Early/Lower Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; yellow limestone

• "a yellow Cretaceous limestone"

Size class: macrofossils

Collected by W. E. Webb; reposited in the AMNH, USNM

Primary reference: E. D. Cope. 1869. Synopsis of the Extinct Batrachia, Reptilia and Aves of North America. Part I. Transactions of the American Philosophical Society, New Series 14:1-104 [R. Butler/E. Dunne/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117846: authorized by Roger Benson, entered by Roger Benson on 27.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sauropterygia - Polycotylidae
Polycotylus latipinnis n. gen. n. sp.
Polycotylus latipinnis n. gen. n. sp. Cope 1869 plesiosaur
Holotype (USNM 27678/AMNH1735)